package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    // 新增套餐
    @Transactional
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        // 保存套餐数据
        Setmeal setmeal= new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.insert(setmeal);
        //保存套餐菜品关系数据
        //获得套餐id
        Long id=setmeal.getId();
        //利用集合储存套餐菜品关系数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(id);
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

    //分页查询
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        int pageNum=setmealPageQueryDTO.getPage();
        int pageSize=setmealPageQueryDTO.getPageSize();
        //开启分页
        PageHelper.startPage(pageNum,pageSize);
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    //批量删除套餐
    @Override
    public void deleteById(List<Long> ids) {
        //如果是起售中的套餐，不能删除
        ids.forEach(id->{
            Setmeal setmeal=setmealMapper.getById(id);
            if (setmeal.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        ids.forEach(setmealId->{
            //删除套餐数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });

    }

    //根据id查询套餐和关联菜品的信息
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        //根据id查询套餐
        Setmeal setmeal=setmealMapper.getById(id);
        //根据id查询套菜关联的菜品数据
        List<SetmealDish> setmealDishes=setmealDishMapper.getBySetmealId(id);

        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        //封装成setmealVO返回
        return setmealVO;
    }

    //修改套餐

    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        //修改套餐数据
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);

        //套餐id
        Long id=setmealDTO.getId();
        //删除套餐关联的菜品数据
        setmealDishMapper.deleteBySetmealId(id);

        //插入新的菜品数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(id);
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

    //套餐起售,停售
    @Override
    public void startOrStop(Integer status, Long id) {
        //如果套餐内有菜品是停售的，则不能起售套餐
        if(status==StatusConstant.ENABLE){
            List<Dish> dishList=dishMapper.getBySetmealId(id);
            if(dishList!=null&&dishList.size()>0){
                dishList.forEach(dish -> {
                    if (dish.getStatus()==StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal=Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }


    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
